Pickling machine



' A. 'J. R. GREER PICKLING MACHINE Aug. 31, 1937.

Fi1 ed June 1o, 1937 5 sheets-sheet 1 5 Sheets-Sheet 2 Aug 31, 1937. A. J. R. GREER PICKLING lMACHINE:

Filed June l0, 1957 Aug. 31, ls?. 1 A, J R, GREER 2,091,921

PICKLING MACHINE Filed June 10, 1937 5 Sheets-Sheet 3 Mey/Mmm@ Aug. 31, 1937. VA, J R, @REER 2,091,921

PICKLING MACHINE Filed June 10, 1937 5 Sheets-Sheet 4 mem/TM Aug. 31, 1937. A. J. R. GREER l 2,091,921

I PICKLING MACHINE 4 Filed June 1o, 1937 S sheets-sheet 5 Agns ker gM/ fff/ Patented Aug. 31, 1937 UNITEDSTATES PATENT ori-Ice rrcxmm mom y -AxnesJJxeevel(traer,lilou'u'mntylwm.W..va.uv application .im 1e,4 1m, sam No. '14u15 14 claim. (ci. zes-'n The invention relates to picklins apparatus and more particularly to apparatus for pickling coilsv uncoiled after coming from the hot rolling mill and passed through a continuous pickling apparatus. Such pickling machines, however, are prohibitive, both because of the cost of installing and the great-amount of space required, for use in the average smaller cold rolling plant, in which 'one of the chief diilicultiesencountered is the pickling ofjhot rolled coils of strip as received from the manufacturer of the hot rolled strip. It is usually necessary for theaverase cold rolling plant-to keep on hand a large. stock of hot rolled strip of various gauges and widths so that they may quickly fill orders for any gauge or size of cold rolled strip required. Pickled hot rolled strip is not usuallypurchascd Vby the cold rolling plant, not only because of thev increased cost ofthe same but because the pickled coils will quickly rust if held in 'storage' for any appreciable time before cold rolling. It is therefore common practice in the smaller cold rolling plants to uncoil the hot rolled strip and'pass it through a roll bending machine in order to break the hot mill scale and open the coil into which bent rods are insertedl to maintain the desired spacing of the strip within the coil. 'I'he coil is then placed on end in a' picklins tank in which relativeag'itationgis produced between the coil and the acid, after which the pickled coil is `washed as in usual pickli'ng practice.

This method of picklingcoils is slow and costly mbecause of the considerable amount of manual' labor required to open the coils, insert the spuc ing rods and removethem after the pickling operation. .Dimculties are also encountered-in this operation, particularly in the pic'kling' of coils oi wide'st'rip where. the upper edges may be.

properly separated by, the bent rods while thenllower edges may contact at places resultingin be eiilciently and economically pickled with a,

minimum oi timeand'labor, as eiiectiveiy as is possible' with the expensive continuous type o! Ypicklin'g apparatus l in some o! thelarger mills. v A

y An important object of the invention is to v providemeans for rotating a coil as itprogresses t throughs pickling tank, .therotation of the coil 5 producing the necessaryl agitation of the plckling A further object is to suspend a c oil within a pickling tank by means oi' a mandrel or rod which is rotated as it moves across the pickling tank, '10v consequently rotating the coil suspended thet'c-l on as it 'through `the acid. p

Another object is to provide for looselyV recoiling the strip so that whenthe coil issuspended upon the mandrel the lower wraps or'layers of the 15 Y coil will open up, permitting free access of the acid to all portions oi the surface thereof and as the mandrel is rotated and. moved forward -across the pickling tank, the coil will beslowly rotated upon the mandrel, continuously opening a0 up successive vportions of the wraps or layers thereof and submerging them in the acid.

Still another object is to provide means for alternately agitating and submerging each por-f tion o! the coil in the acid and exposingv the same 25 to the atmosphere so as to produce clean pickling of all portions of the-strip.

Another object-is to .provide means iortiltini;

'the coll endwise as it is removed from the acid tank so as to drainthe-acld therefrom beiorcrlll' the coil is transferred into the iirst water tank.

AV further object is to provide novel transfer v means for transferring the coil from the pickling' tank to the ilrst water tank, from the nrst water tank to the second water tank, and Yfrom the 35p second water tank.v

A still further'4 object is to provide an up-ender which receives the coil from the second water tank and up-ends the. coil onto a conveyor or the like by means of which the coil may be trans `40 ferred tothe cold rolling mill or other destination.

vA still further object is toprovide a novelv v lmandrel adapted'to ride upon tracks associated with the pickling tank and water tanks and pro- 45 vided with sprockets adapted to be engaged by drive chains for rotating the mandrel along said tracks.

Die above objects together with others which will be apparent from the drawings or which may be later referred to may be attained by constructing the improved pickling machine in the manner illustrated in the accompanying drawings, in which mure 1a a a' mammina neuem vieimr i .40 transfer from the acid tank to the rst water the loose coiler, gravity coil storage, coil loading mechanism and.the entrance end portion of the pickling tank;

Fig. 1b, a similar view of the discharge end portion of the pickling tank, the tilting coil transfer which transfers the coils to the first water tank, and theflrst water tank;

Fig. 1c, a similar view showing the coil transfervwhich transfers the coils from the first water tank tothe second water tank, the second water tank, the coil transfer which transfers the coils from the second water tank and the up-ender and conveyor;

Fig. 2a, a'top plan view of the mechanism shown in Fig. 1a;

Fig. 2b, a top plan view shown in Fig. 1b;

Fig. 2c, a top plan view of the mechanism shown in Fig. 1c;

Fig. 3, an enlarged transverse sectional view through the pickling tank, showing a mandrel of the mechanism mounted on the tracks, driven by the chains and supporting a coil in the acid;

Fig. 4, a longitudinal sectional view taken as on the line 5-5, Fig. 3;

- Fig. 5, a transverse sectionalview showing the manner in which the coil is tilted to drain the acid therefrom as it is removed from the acid tank;

Fig. 6, an enlarged detail elevation showing the manner in which the sprockets upon the mandrel are engaged by the drive chains; and

Fig. '1, a section taken as on the line 8-8, Fig. 6.

Similar numerals refer to throughout the drawings.

The machine comprises generally the loose coiler A, the gravity coil storage B, the coil loading mechanism C, the acid tank D, the coil similar parts tank E, first water. tank F, coil transfer from the first water tank to the second Water tank G, the second water tank H, coil discharge mechanism I, up-ender lJ and gravity conveyor K ar- 5 ranged in the sequence enumerated. 'I'he loose coiler A may be of usual and well known construction, comprising a series of bending rolls I through which the strip I'I is passed and coiled loosely into a coil I2 which may 0 be ,supported upon the rolls I3. For the purpose of bending the outer end of the strip inward against the adjacent layer, as indicated at I4.in Fig. 4., a plunger I may be provided and operated as bythe air or hydraulic cylinder I8.

5 After a coil is loosely coiled upon the coiler A, it is discharged upon the gravity coil storage B which may comprise a platform inclined at a slight angle away from the loose coiler, the

coil rolling down said platform to the position 0 shown at I2a in Fig. 1a Where it engages the stop I1 which is pivoted intermediate its ends as at I8 to the frame I9 and provided with the depending arm pivotally connected as at 2I to f the plunger. 22 of an air or hydraulic cylinder 5 23 supported by the frame I9.

Inclined rails 24 are mounted upon the frame I9 and located between the stop I1 and the loading mechanism C. Thisloading mechanism includes a rocker shaft 25 journaled as in the bearings 26 and provided with a spaced pair of upwardly disposed arms 21 having the forked upperends 28. A motor (not shown) or other suitable driving means, is provided for oscillating the shaft 25.

A rearwardly projecting foot 29 is carried by end of the projecting portion 30 thereof check-- ing the forward movement of the coil.

A mandrel indicated generally at 33 is then inserted through the open'center of the coil and asv the cylinder 23 is reversed, the weight of the coil is transferred to the mandrelfwhich is supported upon the rails 24. The mandrel then rolls downward and forward upon these rails until it is caught in the forked ends 28 of the loading mechanism arms 21, the coil being then in the position shown at 12b in Fig. 1a.

The pickling unit D is located directly beyond the coil loading mechanism and includes, the elongated tank 34 preferably located below the floor level, as shown, and having the rails 35 carried at each side of the tank as by the bracket 36 which may be connected'in any suitable manner to the side walls of the tank near'the upper edges thereof.

Above each of the rails 35 is located an endless chain 31 located over sprockets .38 land 39, positioned near the forward and rear ends of the acid tank respectively, and over the curved chain guides 40 and 4I located below the sprockets 38 and 39 respectively and' positioned to upon a shaft 46 journaled through the bearing brackets 43, the gears meshing with pinions 41 upon a shaft 48 also journaled in said bearing brackets. The shaft 48 may be connected through suitable gear reduction or the like as indicated at 49, to a motor 50 located at oneside of the acid tank.

The sprockets 39 at the other end of the tank are mounted'upon short shafts 5I journaled in bearing brackets 52, a gear 53 being mounted upon each sprocket shaft and meshing with a gear 54 upon'the shaft 55 which is journaled through both of the bearing brackets 52. 1With this construction, bothof the chains31 may be driven in the direction of the arrows shown in Figs. la and 112, the movement of the two chains being synchronized. The upperstrand of each chain may be supported as upon rollers or rods 51.

A downwardly and forwardly curved guide 58, preferably having an upwardly ared entrance mouth 59, is located near the entrance end of the acid tank adjacent to each of the chains 31 and adapted to receive the pintles 50 of the mandrels 33 to guide each mandrel into position beneath the lower strands of the chains so that the sprockets 6I upon themandrels will engage said lower strands of the chains as the flanged wheel portions 62 of the mandrels are received upon the rails 35, the chains thus driving the mandre'ls and causing them to roll forward upon the rails 35, suspending at least one-half of each coil within the acid in the positions indicated at I2C, the rotation of each mandrel as it moves forwardly upon the rails causing the coil suspended aesinet therefrom to be rotated through the acid, agitating the acid by the movement of the coil and alternately exposing each portion of the coil to the pickling acid and to'the atmosphere.

It has been found that in the pickling of metal the best results are obtained by alternately submerging the metal in the acid bath and exposing it to the atmosphere and continually agitating the metal throughout the operation. It will be seen that this movement of the coils through the acid tank automatically produces this beneficial result.

As best shown in Figs. 3 and 4, as each loose coil hangs on the mandrel the bottom layers or wraps of the coil tend to hang open or loose, the weight of the coil tending to close the layers or wraps of the coil above the mandrel. This condition will vary somewhat depending upon the gauge of the metal strip forming the coil and 20, the manner in which the coil is formed. whereby approximately anywhere from one-half to threefourths of the coil may be submerged in the acid at one time.

It should of course be understood that the mandrels are formed of suitable acid-proof materiall so as to resist the action of the acid to'` which they are subjected, and if desired, annular shoulders |53` may be formed upon the mandrel to space the ends of the coil away from the side walls of the tank.

The first water tank 64, comprising a part of the rst washing unit F, is located directly beyond the acid tank and preferably at a lower level than the Aacid tank, as best shown in Fig. 1b. The transfer unit E is located between the acidv tank and the first washing tank and comprises a shaft 65 journaled in bearings .66 and provided with a spaced pair of coil transfer arms 61, each having a coil engaging hook 68 at its free end.

The shaft 65`may be//connected through suitable gearing indicated generally at A69, to a motor 10 adapted to be operated by a limit switch located at 1| in the path of the mandrels and arranged to be automatically operated thereby as each mandrel is received in the hooks 68. As the sprockets of each mandrel become disengaged from the driving chains 31, the mandrel rolls down a slight incline 12 and is deposited in the hooks 68 of the coil transfer arms, at the same time operating the limit switch 1| to start the motor 10.

As best shown in Fig. 5, one of the hooks 68 is slightly longer than the other so that as the mandrel is raised to remove the coil from the acid tank, the mandrel and coil are tilted endwise, permitting the acid to drain from the coil back into the acid tank before the coil is transferred to the first washing tank.

The washing tank 64 is preferably of greater width than the acid tank so as to receive the entire length of the mandrel therein as best shown in Fig. 2b. Rails 13 are supported inside of the tank 64 and spaced from the side walls thereof,

65 at a point considerably below the top of the tank to receive the flanged wheel portions 52 of the mandrels in such position that the entire coil is submerged within the water when the coils are received in the tank in the position shown at 52d.

A pair of driving chains "it, similar to the chains 31, are provided for moving the mandrels with the coils suspended thereon through the tank 6d, these chains being located over the fory ward and rear sprockets 'i5 and 'it respectively,

mounted upon shafts 11. and 18 journaled in the bearing brackets 19 and 80 located adjacent to the forward and rear ends respectively of th tank- 64.

Curved chain guides 8| and 82 are located below the sprockets 15 and 16 respectively, for guidingthe lower strand of each chain 14 into engagement with the sprockets 6| of the mandrels and downwardly and forwardly curved guides 83 are provided for receiving the pintles 60 of each mandrel to guide the mandrel into position upon the rails 13 where the sprockets 6| thereof will be engaged by the chains. l

Gears 84 upon the sprocket shafts 11 mesh with gears 85 mounted upon a shaft 86 journaled in the bearing brackets 19, these gears in turn meshing with pinions 88 upon a shaft 89 also journaled in the bearing brackets 19. -The shaft 89 is connected as through reduction gearing 9|) or the like with a motor 9| for driving both of the chains 14 in unison.

A gear 92 may be fixed -upon the, shaft 18 of each of the sprockets 16, said gears meshing with the gears 93 upon a shaft 94 journaled through the bearing brackets in order to assist in synchronizing the movement of the chains 14.

The second water washing unit H may include the tank95 which is substantially similar to the tank 64 but which may be of less length, as indicated in Figs. lc and 2c. The coil transfer mechanism G is located between the first and second washing tanks and may comprise a shaft 96 journaled in bearings 91 and provided with the spaced coil transfer arms 99 having hooks 99 at their free ends'. Both of these-hooks may be of the same length as it is not necessary that the coil be tilted endwise as it is lifted out of the washing tank 618, as is desirable in lifting the coil from the acid tank. At the point where each mandrel is released from the chains 16, the rails 13 are downwardly and forwardly inclined as at S00 in order to deposit the mandrel onto the hooks 99 of the coil transfer arms. l

The shaft 95 of the coil transfer mechanism may be connected through suitable gearing indicated generally at ||l| with a motor |02 which may be controlled by a limit switch indicated at |93 adapted to.be operated by the mandrel as it is deposited in the hooks 99.

Rails |04 may be located within the second water tank 95 to receive the mandrels from the coil transfer mechanism as they are guided through the downwardly and forwardly curved guides |05. Drive chains |96 are provided above said rails for engagement with the sprockets of the mandrels to drive them along the rails in the manner above described relative to the acid f tank and the first washing tank. These chains are located over sprockets |01 and |08 adjacent to the forward and rear ends respectively ofthe tank 95 and over the curvedchain guides |09 and lill.

The sprockets |08 may be mounted upon short shafts journaled in the bearing brackets M2 and gears ||3 may be fixed upon said shaftsand in mesh withgears Hd mounted near opposite end portions of the shaft M5 journaled in the bearing brackets H2.

The sprockets lill may be mounted upon short shafts ||6 journaled in the bearing brackets H1 and gears I8 may be xed upon said shafts and meshed with gears H9 mounted upon the shaft |20 journaled through the bearing brackets H1. The gears IIB may mesh with pinions lil upon the shaft |22 journaled in the bearing brackets reduction |23with the motor |25.

The forward ends of the rails |04 may be inclined downwardly as at |25, at the point where the sprockets 6| of the mandrels are disengaged from the drive chains |08 inorder to convey each mandrel forward and deposit the same in the hooks |26 of the coil discharge arms |21` forming part of the coil discharge mechanism I. These arms are carried by the shaft |28 journaled in bearings |29 at each side of the tank 95.

One of the hooks may be longer than the other in order that the water will drain from each coil as it is lifted out of the tank 95. The shaft |28 is connectedk by suitable gearing indicated generally at |30 to a motor |3l which may be controlled by a limit switch |32 arranged to be automatically actuated by the depositing of a mandrel in the hooks |26 of the coil discharge arms i217.'

The coil discharge mechanism includes a cradle |33 pivoted as at |33' upon a frame |34 located just beyond the discharge end of the tank 95. An arm' |35 depends from the cradle and is connected to the plunger |36 of an air or hydraulic cylinder |31 by means of which the cradle may be rocked upon its pivot.

The coils, after passing through the second water tank 95, as indicated at |2e, are removed 'oy the coil discharge arms |21 and deposited upon the cradle 33 which receives the weight ofthe coil, as shown at |2f, the mandrel being supported upon the notched brackets |33 from which it may be easily removed.

The up-ender indicated generally at J is adapted to receive the coil from the cradle |33, after the mandrel has been removed therefrom. This up-ender may include a pair of substantially semicircular rockers |39 mounted to oscillate upon rollers |40 and adapted to be operated as by a motor |4| through any suitable mechanism such as the pinion |42 and curved rack 43.

The platform |44 ofthe up-ender is adapted to receive the coil from the cradle |33, in the broken line position indicated at |29. At this time the platform |44 is substantially horizontal and the platform |45 substantially vertical. The motor |4| may then be operated to rock the upender, bringing the roller platform |45 into substantially horizontal position so that the coil is located on end and discharged onto the gravity conveyor K in the broken line position indicated at |2hI in Fig. 2c, the coil being conveyed upon the conveyor K to the cold rolling mill or other desired destination.

It is believed that from the above description the operation of the improved pickling machine will be obvious but the complete operation may be briefly described as follows:

After each coil of material is loosely coiled upon the loose coller indicated generally at A, it is discharged onto the inclined gravity coil storage platform B and rolls down until it contacts the stop 32 as indicated at |2a.l in Fig. 1a. When the cylinder 23 is operated, the stop 32 is lowered out of the path of the coil, permitting the coil to roll onto the upper surface 3| of the stop, the upwardly curved forward end 30 thereof stopping'l the coil from further forward movement.

A mandrel 33 may then be inserted through the center opening of the coil and as the cylinder is operated to move the stop back tothe full line position shown in Fig. 1a, the weight of the coil -will be received upon the mandrel which is sup-l ported upon the inclined rails 24, permitting the mandrel with the coil thereon to roll forward on the rails` until the ends of the mandrel are received in the forks 28 of the coil transfer arms 2i.

When the motor or other driving means for the shaft 25 is operated, the arms 21 will be lowered, entering the ends of the mandrel into the curved guides 58 which guide the mandrel down onto the rails where the sprockets 6| of the mandrel are engaged by the drive chains 31 which start the mandrel to rotate forwardly upon the rails.

With this forward rotation of the mandreLthe coil suspended therefrom will be rotated in the same direction, the lower portion of the coil being submerged in the acid in the tank 3d while the upper portion of the coil is exposed to the atmosphere. As the coil is continually rotating as it moves forward through the acid tank, each portion thereof will be alternately submerged in the acid and exposed to the atmosphere, producing a clean pickling of the strip.

As each coil reaches the discharge end of the acid tank, the mandrel thereof will be disengaged from the chains 31 and will roll down the inclined ends 12 of the rails and be deposited' in the hooks 68 of the coil transfer arms 51.

At this point the mandrel will automatically trip the limit switch 13|, starting the motor 1@ to operate and swinging the coil transfer arms 51 in a clockwise direction as viewed in Fig. lb. One hook 80 being longer than the other, the coil will be tilted as it is raised from the acid tank, draining the acid from the coil back into the tank.

The coil transfer arms will deposit the ends of the mandrel in the curved guides 83 which guide the mandrel onto the rails 13 in the rst water tank 64, the sprockets upon the mandrel being engaged by the drive chain 14 rotating the man drel forwardly along the rails 13 and carrying the coil suspended therefrom and submerged in the.

water.

As the coil reaches the discharge end of the,

as viewed in Fig. 1c, depositing the ends of theA mandrel in the curved guides |05 which guide the mandrel onto the rails |04 in the second water tank 95. The mandrel is engaged by the drive chains |06 which convey the mandrel forwardly along the rails |05 with the coil suspended therefrom and submerged in the hot water.

As the mandrel is released from the chains H3G, it rolls down the inclined ends |25 of the rails |04 and is received in the hooks |26 of the coil discharge arms |21, tripping the switch H32, and starting the motor |3i which moves the arms |21 inv a clockwise direction, depositing the coil upon the cradle |33 and depositing the mandrel upon the notched bracket plates |38 so that it .may be removed fromthe center of the coil.

When the cylinder |31 is operated to Withdraw the plunger |36, the cradle |33 is rocked forwardly and downwardly, discharging the coil onto the platform |44 of the up-ender. As the up-ender is rotated through a substantially 90 arc by the motor I4 the coil will be deposited on end on the conveyor K.

I claim:

1. Pickling apparatus lfor pickling a coil of metal including a tank containing liquid, a mandrel upon which the coil is supported, a track associatedwith the tank upon whichthe mandrel is. supported,. and conveyor for moving the mandrel valong the tracki'n a substantially f horizontal' direction and cooperating means on -theconveyor means and mandrel for rotating the i 't mandrel as itis movedalong the track whereby Vthe coil is rotated and moved in a substantially horizontal `direction through the liquid.

V '1 2. Pick1ing apparatus for picklln'g a lcoil of metal, including a tank containing liquid, a mandrel upon which the coil is supported, and 'conveyor means for continuouslymoving the mandrel along the tank in a. substantially horizon- 1 l5 tal direction and continuously rotating the mandrel as it is. moved along the tank whereby the v'coil is .continuously rotated and continuously -moved .in a substantially horizontal'direction .throughthe liquid.

2o 3,1Pickling Iappar'atusfor pickling a' coil of metal, including a 'tank containing liquid, a man- *drel'upon which the coil.issupported. means adjacent to the top of the. tank'for forwardly moving f and rotating the mandrel for passing the coil partially submerged inthe liquid through the tank in a substantially jhorlxontal' direction and rotating the coil as it ispassedthrouglr the tank.

4. Pickling apparatus 'for pickling a coil of metal. includingv a-tankcontaining. liquid, associated with the a mandrel upon which the coilis supportedg'a sprocket upon'themandrel, a drive chain 'ffor 'engagement `witli the j sprocket for .moving the 'mandrel over the and rotating the mandrel as| it' is moved .over the 1 orails wher'ebyjthief rotated vand moved.

'wtnrougntholiqmd. Y -I 5. Picklig apparatus `for picklingv a coll of metaljincluding a'tank containing liquid. rails' associated'with the-tank, a mandrel which 4o the coil is supported, guidesat the entrance -enda of' the tank for guidingthe mandrel onto the.

r'l rails, a sprocket upon themandreha drive'chain )for A.engagement with.- the sprocket for moving the'mandrel over. the-railsand rotating the mandrelasit is moved ov'erthe'rails whereby the isrotated and-movedthrough the liquid. 1 6. Pickling apparatus for pickling acoil of vniet- -al including a tank containing liquid, rails associated with. the tank, v'a mandrel upon whichtbe 5o coil supported, 4a sprocket upon the mandrel,

* adri'v'e chainofo'r engagement with the sprocket for moving the mandrel over the raillaandlrotating the mandrel as it' is moved `o'ver the-rails whereby 'the coil is rotated and Amoved through the liquid, and transferV arms at the discharge end of the tankfor` removing the coll from the tank.

'1. Pickling apparatus includinir'a..v tank con-` liquid, .a second tank 'containing fliquid. located beyond 'named tank, amandrel for supporting' a cilofmetal to be treatcdgffcon-l veyor for 'moving the mandrel theV f tank,.cooperating means .on the conveyor.v meansand. mandrelfor for.

coil tlnough in a 'sub- "5- santini! hormontor one rotating the oon as it n shears: ma o 'oooond conveyor means" for-,forwardly moving the along.

- drelfor rotating the through tnosoooua'tonkinaxmb'ounuailynon.

second' mdfmnferring it to the second conveyor means.

. 8. Pickling. apparatus including a tank. containing acid, a tank containing water 'located beyond Vthe acid tank, amandrel for supporting a coil of metal'to be treated, means adjacent to the .top vof the acid tank for forwardly moving and rotating the mandrel for'passing the coil partiallysubmerged in theacid through the acid tank ina substantially horizontal direction and yond the acid tank, means`for passing'a coil of metal to be treated-through theacid tank ina substantially horizontal direction and. rotating -the coil as it is passed through the acid'tank,v

means for removing the coil from the` acid tank and tilting the coil aszit is removed.

10. Pickling apparatus including'. a tank containing acid, atank containing water located beyond the acid tank, means-for passing a coil of metal to be'treated through the acid tank in a substantially horizontal 'direction' and rotating the coil as it is passedjthrough the acid tank,

--means for removing the coil from'theacid tank AI and tilting'the coil as it is-r'emoved and for then transferring the. coil to the water tank, and means-for. passing the coilthrough the Water tank in a substantially horizontal direction and' rotating the coil as it is l: through the water 11.'.1P'ickling apparatus including a' tank contalnlngliquid, rails assclated withthe tank;

thereon from-the first conveyor means and trans` a mandrel upon which a coil of metal to loe treat ed is supported, a sprocketupon themandrel,` .a drivelcbain for engagement with the sprocket for' moving themandrel vover the rails and rotatj ing the mandrel las itis movedover the rails whereby the coilis rotated and vmoved through the liquid, and -transier arms at the' ldischarge e'ndof-the .tanirforl removing the coil from the tank,.hooks upon said transfer arms, one hook. being longer than the other whereby. the coil is tilted'asitisremove'd from thevtank. l -v 12; Pickling apparatus including. a tankv conacid, 'a tank containing vwater located beyond the acid tank,fa second water tank located beyond` the rst mentioned water tank, means for a` coil of metal ktovbe treated'through the soia taurina-.substantially horizontal direction and rotating the coil as it is passed through, the

` acid tank',meansfor removingA the coil from the 'acid tankand tilting the coil as it is removedand the coil to the ilrst waterv for .theirv transferring 'eansforpassin'gthecoil iirst tankin a substantially horizontal direction androtating-the coil as' itis` passed through the first Vvmter tank, means for transferrlngthe.'

Acoiltothe'.secondwatertank-.means for uw..

uio oou uio socorroA water tank in' o su stantially horizontal -idirection' and rotating the coil as it is' the second water tank,

'means for removing' the coil from the second and-' tilunaqthe. ooilasit is removed. apparsa including a 4tout oonacid,'atankcontaining waterlocated bewater-tank lomos beyond the iirst mentioned water tank, means iorpassingacoilofmetaitobetreatedthrough the acid tank in a substantially horiaontal direc for passing the coil through the second water tank. m a substantially horizontal direction and rotating the coil as'it is passed through the second water tank, means for removing thev coil from the second water tank and tilting the coil `as it is removed, and means for turning the coil on endafter it is removed from the second water tank.

14. Pickling apparatus including a tank containing acid, a tank containing water located beyond the acid tank, a mandrel vfor supporting a coil of metal to be treated, means adjacent to the top of the acid tank for forwardly moving and rotating the mandrel for passing the coil i partially submerged in the acid through the acid tank in a substantially horizontal direction and rotating the coil as it is passed through the acid tank. means tortransferring the mandrel with.

the coli thereon to the water tank, and means associated with the water tank for forwardly moving and rotating the mandrel for passing the coil through the water in the water tank and rotating the coil as it is passed through the water. AGNES J. REEVES GREER.. 

